fix: Fixes in hasntable

hashtable.c

@@ -99,7 +99,7 @@ void *hashtable_set(hashtable h, const char *key, void *value)
 	}
 	// found replace the value
 	void *old_value = item.found->value;
-	item.found-> value = value;
+	item.found->value = value;
 
 	return old_value;
 }
@@ -137,19 +137,20 @@ void hashtable_destroy_bucket(hashtable h, int i)
 {
 	struct entry *e = h->table[i];
 	while (e != NULL) {
+		struct entry *next = e->next;
 		free((void*)e->key);
-		e = e->next;
 		free(e);
+		e = next;
 	}
 }
 
 void hashtable_destroy(hashtable h)
 {
-	if (h==NULL) return;
+	if (h == NULL) return;
 	for (int i = 0; i < h->size; i++) {
 		hashtable_destroy_bucket(h, i);
 	}
-	free (h->table);
+	free(h->table);
 	free(h);
 }
 
@@ -171,12 +172,15 @@ bool ht_iter_next(ht_iterator *iter)
 	}
 	hashtable h = iter->h;
 
-	while(true)	{
+	while (true) {
 		if (iter->index >= h->size) {
 			return false;
 		}
 		if (iter->entry == NULL) {
 			iter->index++;
+			if (iter->index >= h->size) {
+				return false;
+			}
 			iter->entry = h->table[iter->index];
 		} else {
 			iter->entry = iter->entry->next;